Vacuum press peecolatob



0. R'. KNAPP.

VACUUM PRESS PERGOLATOR.

(No Model.)

Patented Feb. 12, 1884.

Iman-C67? Wfnesses:

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ranged as to be subject to the pressure of the iication -over the mouth of jar A, and is held air-tight UNITED STATES CHARLns RICHARD HNAPP, on

PATENT OFFICE.

sAN rRANCIsCo, CALIFCRNIA:

VACUUM-PRESS IDI-:RooLAToR` SPEGIFICATION forming part of Letters Patent 1\To.'293,335,` dated February 12, 17884. Application filed March i2, 1883. (No model.)

To a/ZZ whom it may concern: I

vBe it known that I, CHARLES RICHARD KNAPP, a citizen of the United States, residing at San Francisco, in the county of San Francisco and State of California, have invented a new and useful Improvement in` VacuumPress Percolators, of which the following is aV speci- The natureof my invention Consists of an improvement in the construction of vacuumpercolators, Wherebyl utilize the transmitted power of atmospheric pressure by the use of an'elastic diaphragm, separating the normal atmosphere from a-vacuum created Within a suitable ain-tight jar, in the interior upper part of which is suspended a porous conical bag, holding drug or other substance, so ardiaphragm for the purpose of separating volatile, gaseous, liquid, or soluble matter from solid or insoluble matter.

In the accompanying drawings, Figure 1 is a plan View of the entire machine; Figs. 2 and 3, sectional views of the same..

The wide-mouth jar A, made of air-tight material, is provided With lip B, and connected with an air-pump by e'XhaustioIrtube l?. The porous conical bag G occupies the upper part of the inside of jar A, suspended from lip B. The cover C is perforated by air-hole E TheA elastic india-rubber diaphragm D is placed between lip B and rim of cover C. Y The mode of operating the machine and utilizing my invention is as follows: The drug or other substance subjected to my process of vacuumpress percolation is placed in porous conical bag G, suspended in jar A, and the elastic india-rubber diaphragm lD is spread over the drug or other substance and covering air-tight at lip B. The Wide mouth of jar A is held in position by Vrim of cover C. Vacuum being created in jar A by an airpump or other means through exhaustion-tube P, the latent atmospheric power is liberated, and the elastic india-rubber diaphragm D, being subject to the action of Vacuum from below and atmospherio pressure from above,'admitted through air-hole B, is caused to press upon the upper surface of drug or other substance subject to extraction with the Vpressure of iifteen pounds tothe square inchof surface exposed, thereby in solution the medicinal active principles and Volatile essential aromas to iioW out of the solid or insoluble matter and down into the lower part of jar A. v What I claim as my invention, and desire to secure by Letters Patent of the United States, is-

The combination of au elastic diaphragm, made of india-rubber or other suitable elastic Causing the soluble or liquidma'tter holding` V material, separating the normal atmosphere from a vacuum created Within a glass jar or other suitable air-tight vessel, in the interior upper part of which is suspended a porous conical bag, holding drug or other substance, so arranged as to be subject to the pressure of the diaphragm, transmitting atmospheric Weight, for the purpose of separating volatile, gaseous, liquid, or soluble matter from solid or in solu ble matter.

CHARLES R101-IARD KNAPP.

- Vitnesses: Y

` WILLIAM MAINLAND BROWN,

HENRY PHILIP DALTCN. 

